Boeing workers will analyze the battery test results in the coming days. Boeing said it can't share details about the tests due to the ongoing investigation. There are no additional 787 test flights scheduled.

Like the Saturday flight, the 787 flight Monday was limited to 13 Boeing test personnel. The flight took off at 10:17 a.m. from Boeing Field, where it returned one hour and 29 minutes later.

The FAA gave Boeing the OK to conduct test flights last Thursday. In doing so, the agency made several requirements, including that the 787 could not fly over heavily populated areas and that Boeing check the aircraft's batteries before the flight.

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